Depends on how "original" you want to keep her, and how much money you want to spend.

If she is basic transportation only and not a show piece, I would look into a V-8 conversion. Ford parts are cheaper than Volvo, and usually more readily available at NAPCARQUESPEPPYAUTOZONE.

Can't speak to the B23, but the B230 / AW 71 is a terrible combination of too little power mated to disasterous gear ratios. Some folks I know have had their B230 give up the ghost and opted for the V-8 Conversions. They are pleased with them. Others have gone back to the B230 because they are more purist in nature. For what it's worth, the mileage on the V-8 conversions is better than my B230/AW71. I average 17/22 and have since the car was new. The V-8's are averaging 19/25.

A new Jasper B230 is going to cost about $5K installed in Richmond, VA. Don't know if it can be mated to your current transmission.


Just my $0.02.
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Regards,

David
1991 744 NA 139+K Miles